Intermittent-movement mechanism for mattress-sewing machines



J. W. DROLL. INTERMITTENT MOVEMENT MECHANISM FOR MATTRESS SEWING MACHINES.

APPLICATION FILED AUG-251mm.

v1 ,3'76,5 1 7. Patented May 3,1921.

5 SHEETS-SHEET l.

Inventor J. W. DROLL.

INTERMITTENT MOVEMENT MECHANISM FOR MATTRESS SEWING MACHINES. APPLICATION FILED AUG-25, I919.

1,376,517. Patented May 3,1921.

5 SHEETS-SHEET 2.

Inventor J. W. DROLL. INTERMITTENT MOVEMENT MECHANISM FOR MATTRESS SEWING MACHINES.

APPLICATION FILED AUG-25.1919.

Patented May 3, 1921.

5 SHEETSSHEET 3.

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y fly- J. W. DROLL. INTERMITTENT MOVEMENT MECHANISM FOR MATTRESS SEWING MACHINES.

APPLICATION FILED AUG-25. I919.

5 SHEETSSHEET 4.

1. W. DROLL. I INTERMITTENT MOVEMENT MECHANISM FOR MATTRESS SEWING MACHINES.

APPLICATION FILED AUG-25,1919.

Patented M 5 SHEETS ET 5- UNITED STATES PATENT; OFFICE.

JOSEPH W. DROLL, 0F OAKLAND, CALIFORNIA Specification of Letters Patent.

Patented May 3, 1921.

Application filed August 25, 1919. Serial No. 320,038.

T 0 all whom it may concern.

Beit known that I, JOSEPH W. DROLL, a

citizen of the United States, residing at Oakland, in the county of Alameda and State of California, have invented certain new and useful Improvements in an Intermittent-Movement Mechanism for Mattress- Sewing Machines, of which the following is a specification.

My invention relates to improvements in intermittent movements and particularly for mattress roll forming machines of the {\ype disclosed in the United States Patent then permanently 0. 1,300,140 issued to me on the 8th day of April, 1919, reference to which patent is hereby made.

i In a mattress roll forming machine of the type referred to said machine is arranged to travel around the edges of a supporting table upon which the mattress rests. The machine is provided with packing and sewing needles which pack and form a roll and secure the formed roll by stitchlng throug the junction of said roll with the mattress. After each operation the entire machine is moved forward the length of one stitch.

In machines of this type the resistance due to inertia must be quickly overcome to move the entire mass a distance equal to the length of one stitch in order to produce the proper number of stitches per minute, and after being set in motion the acquired momentum of said mass must be quickly overcome or resisted sufficiently to bring the machine to a full stop at the required point, and to. automatically lock the machine against further forward movement at that point, before starting the next operation of.

packing, forming and sewing the roll.

The primary object, then, of the present invention is to provide an improved intermittent movement adapted to move a ma chine equal distances at regular intervals.

A still further object of the invention is to provide, an improved device of the character described having improved means for automatically locking the machine against further forward movement, at the completion of each intermittent movement.

It is also an object of this invention to provide a device of the type set forth having means whereby the length of the intermittent movements may be easily and readily adjusted to increase or decrease the number of stitches applied to a given length of the mattress roll.

Another object of the present invention is to provlde an improved intermittent movement of the class described arranged to coact with the packing and sewing mechanism whereby said machine will only be moved durlng inoperative periods of said packing and sewing mechanlsm.

I accomplish these several objects by means of the device disclosed in the drawings forming a part of the present specification, wherein like charactersof reference are used to designate similar parts throughout the said specification and drawings, and in which:

Figure l is a broken-elevation of a mat-v tress supportingtable disclosing a front elevation of the machine applied thereto;

Fig. 2 is a broken view partly in section disclosing a right hand elevation of the machine, disclosing the intermittent movement mechanism;

' Fig. 3 is an elevation of the opposite side of the machine Fig. 4 is an enlarged broken'plan view of the gearing for operating the intermittentmechanism;

Fig. 5 is an enlarged sectional view taken on line 55 of Fig. 1 in the direction indi cated;

Fig. 6 is an enlarged broken sectional view taken on line 6-6 of 2 in the direction indicated;

Fig. 7 is a side elevation of Fig. 6; 'and' Fig. 8 is a view similar to Fig. 6 but disclosing the parts in different position.

Referring to the drawings the numeral 1 is used to designate a mattress supporting table having a vertically disposed flange 2 on the edges thereof to retain a mattress, not shown, on said table 1. H

The table 1 is provided around-the sides and slightly below the top thereof with an upwardly faced channel track 3 and horizontally disposed rack bars 4 and 5, the bar 4being located directly under the track 3 and the rack bar 5 near the base or floor line of the table 1.

A roll forming and stitching machine, indicated in general by the numeral 6 is provided with suitable motor 7 operatively connected to a main driving shaft 8 which in. turn actuates the roll forming. and stitching operating mechanism indicated in general by the numeral 9. The operating mechanism 9 operates first the packlng needles 11 to engage the corner or edge of a mattress, not shown, and pack the stufling of said mattress into the corner or edge thereof to form a roll which roll is immediately permanently secured by means of the stitching or sewlng needle 12 which operates in conjunction with the shuttle 14.

Immediately after the roll is formed and stitched and while said packing needles 11 and sewing needle 12 are returning to a normal or inactive position, the resistance due to the inertia of the entire machine 6 must be overcome to quickly move the said machine forward a predetermined distance, in this case a distance equal to the distance between stitches in the formed roll, and at the completion of said forward movement the acquired momentum of the moving machine must be overcome quickly to bring the machine 6 to a state of rest at the precise point' where the next stitch is to be made.

Thus it will be seen that the present invention comprises means operating in conjunction with the roll forming and stitching means tomove the machine intermittently or a predetermined distance at regular intervals during the inactive period of said roll 'able spring-31.

forming and stitching means, and for bringing the machine to a state of rest at the completion of said movement and also to pre vent further movement of said machine.

To accomplish thisand also to assist in maintaining the moving machine in a substantially vertical or upright position I have provided said machine with a pair of casters 15 which ride in the upwardly faced channel 3 and thereby slidably mount said machine 6 on the side of the table 1.

The machine 6 is also provided with a vertically disposed shaft 16 provided with pinions 17 and 18 at the upper" and lower ends thereof which mesh with the upper and lower rack bars '4 and 5 respectively. The shaft 16 is also provided with oppositely faced ratchets 19 and 21'and a bifurcated lever 22 which is rotatably mounted upon the shaft 16 and straddles the forward moving ratchet 19. with a spring controlled pawl 23 for engagement with the forward moving ratchet 19 havmg a'pin 24 extending throu h a slot 26 within 'the lever 22 whereby sai pawl may be disengaged from the ratchet 19, the purpose of which will hereinafter be more fully disclosed. I

The lever 22 is provided on one bifurcation thereof with a cam surface 27 arranged to engage and Qlisengage a pin 28 on a pawl 29 arranged for engagement with what I term the stop pawl 21, pivotally mounted upon the machine 6 and controlled by a suitend of the bifurcated The free or outer The lever. 22 is provided lever 22 is connected by means of a link 32 to a lever 33 pivotally connected to the frame of the machine 6 as disclosed in Fig. 5 of the drawings. The lever 33 is provided with a roller 36 engaged and actuated by a cam 37 on a shaft 38 in turn connected, by means of gears 39, 40, 41 and 42 to a gear 43 mounted directly upon the main driving tions to be ready forthe successive operation the cam "37 rotates to release the roller 36 and permit the spring 44 to move the link 32 and lever 22 to the position disclosed in Fig. 8 of the drawings.

During this movement the cam. portion or surface 27 of the lever 22 engages the pin 28 of the stop. pawl 29 and disengages said pawl from the stop ratchet 21. the cam 37 continues to rotate the surface 37 thereof engages the roller 36 of the lever 33 and moves the lever 22 anti-clockwise as indicated by the curved arrow in Fig. 8 thereby causing the pawl 23 of the lever 22 to engage the moving ratchet 19 and partially rotate the shaft 16 and pinions 17 and 18 thereon, said pinions thereby traveling along the rack bars 4 and 5 and moving the entire machine the required distance.

Simultaneously, with this operative or active period of the lever 22,- the cam surface 27 thereof retains the stop pawl 29 away from the stop ratchet 21 until the movementis nearly completed, at which time said cam surface 27 passes beyond the pin 28 of the stop pawl 29 and permits said pawl to engage the opposite faces of stop ratchet 21 to prevent further movement of, the shaft 16 and the machine 6, thereby stopping the Inachine at the required point where the next stitch is to be made in the formed roll on the mattress.

The lever 22 is provided with several apertures 25 by means of which the link may be connected to said lever to move the same through a greater or'lesserv arc, the throw of the cam 37 remaining the same, .thereby .provldlng a means whereby the distance between the stitches on the roll of the mattress may be adjusted.

' It is sometimes necessary to release the machine6 from engagement with the table 1 p l .to movethe-same backward, as in adjusting and replacing stitches. This is accomplished by moving the lever 2 2, by hand, to the position disclosed in Fig. 8 of the drawings, which will cause the cam surface 27 to release the stop pawl 29 from its ratchet 21. By means of the pin 24 the pawl 23 of the lever 22 may be disengaged from its for- Ward ratchet 19 so that the shaft 16 is free to turn. The machine 6 may then be easily moved backward or forward relatively to the table 1.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is 1. The combination with a mattress supporting table having a mattress roll forming and stitching machine slidably mounted upon one side thereof, of racks mounted upon said table; a shaft rotatably mounted upon the machine pinions mounted upon the shaft and engaging the rack on the table; means operatively connected with the roll forming mechanism of the machine and arranged to partially rotate the shaft and pinions thereon to move said machine on the table a predetermined distance at regular intervals and while the roll forming mechanism is temporarily inactive; and means for automatically engaging the shaft at the completion of each partial rotation thereof to prevent further movement of said shaft and the machine relatively to the table.

2. The combination with a mattress supporting table having a mattress roll formlng and stitching machine slidably mounted upon one side thereof of racks mounted upon said table; a shaft rotatably mounted upon the machine; pinions mounted upon the shaft and engaging the rack on th table; means operatively connected with the roll forming mechanism of the machine and arranged to partially rotate the shaft and pinions thereon to move said machine on the table a predetermined distance at regular intervals and while th roll forming mechanism is temporarily inactive; and means for adjusting the degree of rotation of the shaft to regulate and adjust the distance the machine is moved intermittently.

3. The combination with a mattress supporting table having a mattress roll forming and stitching machine slidably mounted upon the one side thereof, of racks mounted upon said table; a shaft rotatably mounted upon the machine; pinions mounted upon the shaft and engaging the racks; oppositely faced ratchets mounted upon the shaft; and means operatively connected to the roll forming and stitching mechanism of the machine and actuated therewith to engage one of the ratchets and partially rotate the same to move the machine a predetermined distance at regular intervals while said stitching and roll forming means is temporarily inactive.

4. The combination with a mattress supporting table having a mattress roll forming and stitching machine slidably mounted upon one side thereof, of racks mounted upon said table; means operatively connected to and actuated cooperatively with the roll forming stitching mechanism of the machine for engaging the racks to move the machine relatively to the tabl a predetermined distance at regular intervals while said roll forming and stitching mechanism is temporarily inactive; and means operatively connected to and actuated by said moving means for automatically locking said means and the machine against further movement at the completion of each intermittent movement.

5. The combination with a mattress supporting table having a mattress roll forming and stitching machine slidably mounted upon one side thereof, of racks mounted upon said table; means operatively connected to and actuated cooperatively with the roll forming and stitching mechanism of th machine for engaging the racks to move the machine relatively to the table a predetermined distance at regular intervals while said roll forming and stitching mechanism is temporarily inactive; means operatively connected to and actuated by said moving means for automatically locking said means and the machine against further movement at the completion of each intermittent movement; and means for temporarily disconnecting said moving and locking means whereby said machine may be moved along the table.

6. In an intermittent movement, the 'combination with a mattress supporting table having a mattress roll formlng and stitching machine slidably mounted on one side thereof, of horizontally disposed racks mounted upon said table; a vertically disposed shaft rotatably mounted upon the machine; pinions mounted upon the shaft and meshing with the racks of the table; a pair of oppositely faced ratchets mounted upon the shaft; a pawl pivotally mounted upon the machine and engaging one of the ratchets; means operatively connected to and actuated cooperatively with the roll forming and stitching mechanism for engaging the other ratchet to operate the shaft and thereby move the machine relatively to the table and a predetermined distance at regular intervals and to normally disengage said pawl from the first mentioned ratchet while the machine is being moved and to automatically release said pawl upon completion of each movement to engage the said ratchet and thereby automatically prevent further movement of the machine.

In witness whereof I hereunto set my signature.

JOSEPH W. DROLL 

